Parts for your 2012 Toyota Bb-Strut mounts

2012 Toyota bB strut mounts — relevance, purpose, and servicing

Strut mounts are absolutely relevant to the 2012 Toyota bB. Technical references including the Toyota bB (QNC20/QNC21) factory repair manual and the Toyota Electronic Parts Catalogue specify a MacPherson-strut front suspension with an upper support/strut mount assembly. In Toyota documentation these appear as the front spring support/strut bearing and insulator at the top of the front struts.

On this model, the strut mounts do two key jobs: they secure the top of the strut to the body, and they isolate noise, vibration and harshness so the cabin stays quiet and composed. Many also incorporate a bearing that lets the strut rotate smoothly when steering. That bearing action is crucial for light, precise steering feel around town and on the open road.

• Act as the structural top link for each front MacPherson strut
• Dampen road shocks and vibrations before they reach the body
• Provide a steering-bearing interface so the strut turns freely

For routine servicing of a 2012 Toyota bB, a visual and hands-on check of the front strut mounts is smart at 40,000–60,000 km intervals, or any time the front struts, springs, or top nuts have been disturbed. They’re wear items, especially on vehicles that see rough roads, heavy loads, or frequent kerb hits.

• Common symptoms of tired strut mounts: clunks over bumps, creaks when turning, vague or “sticky” steering, tramlining, or uneven tyre wear.
• Look for cracked rubber insulators, collapsed mount height, torn dust seals, and rusty or rough-turning bearings.

When replacement is due, it’s best practice to do mounts in pairs and to inspect the strut bearings and upper spring seats at the same time. Many techs fit new nuts and hardware with the mounts and compress the springs using quality compressors. Always settle and torque fasteners with the vehicle at normal ride height to avoid preloading the mount bush.

After any strut or mount work, a wheel alignment is recommended. Fresh mounts can slightly alter ride height and steering axis, and an alignment will keep the bB tracking straight and protect tyre life. If there’s persistent noise after fitment, recheck the top nut torque, spring seating, and bearing orientation per the Toyota service manual. Look after the mounts and the bB will feel quieter, tighter, and more confidence-inspiring on Kiwi and Aussie roads.

Q: How can someone tell if the strut mounts on a 2012 Toyota bB are worn?

A: The giveaway signs are usually clunks or knocks over speed humps, creaks while turning the wheel at low speed, and steering that feels a bit notchy or reluctant to self-centre. Uneven front tyre wear or a new vibration after a bump can also point to a collapsed mount.

A quick test is to rock the car over the front corners while listening at the strut towers, then turn the steering lock-to-lock with the engine running and feel for roughness. A mechanic can confirm by inspecting the rubber insulator and checking bearing smoothness with the strut unloaded.

Q: Should strut mounts be replaced at the same time as front struts on a bB?

A: Yes, that’s the tidy way to do it. The mount and bearing age right alongside the strut, and refitting an old mount to a new damper can bring noises back or spoil steering feel. Doing them together saves labour and helps the fresh struts deliver their proper ride and handling benefits.

If the struts are being changed due to leaks, high kilometres, or harsh impacts, budget for new mounts, bearings, and upper spring seats. Follow with a wheel alignment so the bB drives straight and preserves its tyres.

Q: Is a wheel alignment needed after strut mount replacement on the 2012 bB?

A: It’s strongly recommended. New mounts can alter ride height a touch and shift steering geometry. An alignment dials camber and toe back to spec, giving consistent tyre wear and crisp turn-in.

Ask the shop to road-test first, then align to factory specs. If the steering wheel isn’t perfectly centred or there’s still a wander, they should recheck mount seating, top nut torque, and the orientation of the bearing and spring pigtails.